Average is about equal sharing.
When the average is given but not the total number of parties to be shared with, the question becomes more complex.
Such "before and after" average questions will often appear in Paper 2 of P6 Prelim exams.
Calculator usage is allowed.
Class 6C took a Math test recently and the class scored an average of 81 marks.
If the results of 4 students with average of 64 marks are excluded,
the remaining students will have an average of 83 marks for this test.
How many students are there in class 6C?
If the above question is easy, try to do the more challenging question below.
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